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+Name: zlib |
+URL: http://zlib.net/ |
+Version: 1.2.5 |
+Security Critical: yes |
+License: Custom license |
+License Android Compatible: yes |
+ |
+Description: |
+General purpose compression library |
+ |
+Local Modifications: |
+A few minor changes, all marked with "Google": |
+- Added #ifdefs to avoid compile warnings when NO_GZCOMPRESS is defined. |
+- Removed use of strerror for WinCE in gzio.c. |
+- Added 'int z_errno' global for WinCE, to which 'errno' is defined in zutil.h. |
+- Added 'mozzconf.h' to mangle the function names. |
+- Added logic in zlib.h to undef our earlier mangles when defaulting to 64 bit offset versions of API. |
+- Added casts to suppress VC++ warnings |
+The 'google.patch' file represents our changes from the original zlib-1.2.5. |
+ |
+A more significant change to support mixed-source data compression. See |
+crbug.com/139744 and mixed-source.patch. |
+ |
+Integrated Intel SIMD optimisations from: https://github.com/jtkukunas/zlib/ |
+and modified to accomodate the older version and existing changes in tree. |
+ |
+This introduces new files: simd_stub.c, crc_folding.c, fill_window_sse.c and |
+x86.[ch]. All but the latter are built into a static library to allow the |
+compiler to use the desired instructions only when valid. The latter version is |
+only built on x86 (32-bit and 64-bit) systems with it's functionality stubbed |
+on the others. |
+ |
+Other changes to accomodate: |
+- fill_window() implementation calls into _sse() variant when supported and the |
+ original implementation renamed to _c() |
+- read_buf was moved from local to ZLIB_INTERNAL for fill_window_sse.c to use |
+- INSERT_STRING macro was made a function, insert_string() and an implementation using CRC instruction added |
+- some crc funcionality moved into crc32.c |